5G wireless and millimeter wave technology evolution: An overview

Choudhury, Debabani

doi:10.1109/mwsym.2015.7167093

Cited by 62 publications

(50 citation statements)

References 19 publications

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“…The frequency bands of current conventional systems are below 6 GHz. However, since these frequency bands are used extensively, they will not be sufficient for 5G and beyond communication [11].…”

Section: Introductionmentioning

confidence: 99%

A New Method in Pilot Reuse Factor Selection in Spectrum Efficient Massive MIMO Systems

Dikmen¹,

Kulac²

2019

ELEKTRON ELEKTROTECH

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Spectrum efficiency studies of Massive MIMO systems have continued and still have not been fully explored in the literature. Therefore, the spectrum efficiency definition of a particular user in a cell in a Massive MIMO network is expressed in this paper. In addition, the uplink spectrum efficiency expressions for the Rayleigh fading are included. The Monte Carlo simulations are performed to verify these expressions. Due to the expectation of reaching to a thousand antennas together with the millimetre wave structure in the next years, in this study, it is contributed to the literature by explaining how to select the pilot reuse factor. The realization of this contribution is based on Zero Forcing (ZF) and Maximum Ratio Combining (MRC) schemes. The results of this study are useful for optimal design conditions, such as the number of antennas on the base station and pilot reuse factor selection for the next generation networks in order to obtain spectrum efficiency in Massive MIMO systems.

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Section: Introductionmentioning

confidence: 99%

A New Method in Pilot Reuse Factor Selection in Spectrum Efficient Massive MIMO Systems

Dikmen¹,

Kulac²

2019

ELEKTRON ELEKTROTECH

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“…The 5G network is expected to deliver speeds of the order of Gbps. Hence, it cannot rely on the current low frequency bands (<3 GHz) as they do not offer wide enough bandwidth to support such high data rates, and are almost fully occupied by other communication systems, such as mobile, broadcast and satellite services [4]. As a result, researchers have been exploring millimetre waves (MMWs) because of the abundance of spectrum in the MMW range (30 GHz-300 GHz) which will allow for high speed communications even at low spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

60-GHz Transmission Link Using Uni-Traveling Carrier Photodiodes at the Transmitter and the Receiver

Mohammad

Shams

Liu

et al. 2018

J. Lightwave Technol.

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We present the first demonstration of a wireless transmission link based on uni-traveling carrier photodiodes (UTC-PDs) as transmitter and receiver. In this demonstration, a UTC-PD was used at the transmitter to generate a 1-Gbps ON-OFF keying data signal at a carrier frequency of 61.3 GHz by heterodyning two modulated optical tones originating from an optical frequency comb system. The generated electrical heterodyne signal was transmitted, using a 25-dBi gain parabolic antenna. An identical antenna was used to detect the signal at the receiver, followed by an optically pumped UTC-PD mixer to down-convert the received RF signal to an intermediate frequency of 6.3 GHz, which was subsequently amplified and acquired by a real-time oscilloscope for offline processing. The recovered data showed an open eye diagram, and a bit error rate of the order of 10-5 was measured. The receiver UTC-PD was characterized in terms of its conversion loss and noise figure (NF), and the overall NF of the receiver was measured at 21.5 dB.

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“…The main advantage of precoding in single-user scenario is to simplify the detection process. The model, in this case, is similar to the one proposed in (2)(3)(4)(5). In this case, x m = P m s m where P m ∈ C N T ×N R is the precoding matrix and s m ∈ C N R ×1 is the symbol vector.…”

Section: Precoded Casementioning

confidence: 99%

“…Figure 2.6 shows a typical multi-user MIMO-OFDM scenario, where the BS simultaneously transmits to K users. The data are processed using the same procedure explained above (SU-MIMO-OFDM precoded-case), but in this case the system consists of K blocks similar to D P shown in (2)(3)(4)(5)(6)(7)(8). In this case, the transmission matrix is given by Using the model with M detections introduced in the previous sections, the received signal at the m-th detection can be modeled as:…”

Section: Multi-user Mimo-ofdmmentioning

confidence: 99%

“…It also promises improvements over 4G in terms of denser network coverage, faster download time, HD-video streaming and so on. The endless enormous growth of data traffic volume is one of the main drivers behind 5G, and the annual 25-50% growth of data rate is expected to continue until 2030 and beyond [3]. The challenge is to find and develop the wireless communication network and technologies that will support massive data traffic volume in the coming years.…”

Section: Mark Victor Hansen Introductionmentioning

confidence: 99%

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Antenna Selection in Mimo-Ofdm Systems

CUADRADO¹

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This thesis focuses on the combination of two well-known effective technologies used in many of today's communication networks, Orthogonal Frequency Division Multiplexing (OFDM) and Multiple-Input Multiple-Output (MIMO). It unites the well-known advantages of MIMO communication, such as high data rates and improved link reliability to the characteristics of OFDM, known as intersymbol-interference-free communication and simple frequency-domain equalization. This work presents in detail the signal modelling of MIMO-OFDM system and the adequate processing at the receiver to perform decoupled detections per OFDM subsymbol. In addition, antenna selection strategies are proposed to increase system performance by exploiting some scenarios when the transmitter or receiver is equipped with more antennas than the number of radiofrequency (RF) chains. These procedures are based on the specific metric for the current scenario. The performance of the system is evaluated employing linear equalization or precoding techniques, such as Zero-Forcing (ZF) and Minimum Mean Square Error (MMSE). Simulation results evidence that antenna selection strategies result in significant system performance improvement.

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5G wireless and millimeter wave technology evolution: An overview

Cited by 62 publications

References 19 publications

A New Method in Pilot Reuse Factor Selection in Spectrum Efficient Massive MIMO Systems

A New Method in Pilot Reuse Factor Selection in Spectrum Efficient Massive MIMO Systems

60-GHz Transmission Link Using Uni-Traveling Carrier Photodiodes at the Transmitter and the Receiver

Antenna Selection in Mimo-Ofdm Systems

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